Engine piston



May 6 1924.

2. A.- BRU'EGGER ENGINE PISTON 2 Sheets-Sheet 1 Original Filed Feb. 1920 M'YENTOR Z, AME rug e Br I ATTORNEYS May 6 1924. 1,492,917

I z. A. BRUEGGER ENG-INEVJPISTON Original Filed Feb. 2'. 1920- 2 Shee-ts-Shet 2' lNl/E/VTOR 2.4. Beuaeq-ar;

Ana/mus WITNESSES Patented May 6, 1924.

- UNITED STATES ZENO ABNO BBUEGGEE 01 BOISE, IDAHO.-

ENGI'NE PIS'IQOH.

Original application tiled February 2, 1920, flerial No. 885,891.- Divided and this application filed September 20, 1921.. Serial No. 501,928.

To-allwhom it may concern:

Be itcknown that I, ZENO. Amvo Banncenn, a citizen of the United States, and a resident of Boise, in the county of Ada and State of Idaho, have invented certain new and useful Improvements in Engine Pistons,

of which the following is a specification.

My invention relates to engine istons and particularly to-means carried t ereby for insuring the eflicient lubrication of that side of a cylinder which receives the greatest amount of piston thrusts, the invention being an improvement upon the arran ement fora similar urpose shown in my atent 1,395,794, date November 1, 1921.

A purpose of my present'invention is the rovision of a tubular member or i made m the form of a ring and forme integral with or seperately from an engine piston, and so arranged within the pistonas to trap a portion of the oil projected into the piston in a splash system and to deliver this oil to the outer side of the piston between the contacting walls of the cylinder and piston and at that point where the thrust of the piston is the greatest.

It is also a purpose of my invention to provide a piston which is rovided extesection one form of piston embodying my,

invention.

Figure 2 is. a transverse sectional view taken on the line 2-2 of Figure 1.

Figure 3 is a fra entary sectional view of another form 0 piston embodying my invention.

Figure 4 is a sectional view of another form of piston embodying my invention.

Figure5 is a view similar to Figure 3 showing a modified construction of the piston shown in Figure 4.

Referring specifically to the drawings, 1n which similar referencecharacters re er to similar parts, and particularly to Figural, P designates a piston of the ordinary construction with the exception that it is provided 'interiorly thereof with a tubular member or pi T that extends circumferentially thereo and is inclined downwardly to a point adjacent the lower end of the piston. The member T at its highest point is provided at its u per side with a slot 15 which as clearly own in Figure 2 extends for a minor 1 portion of the circumference of the member. The lowest point of the member T is formed at its periphery with a discharge port 16 that communicates with an outlet port 17 formed in the piston P.

The member T as shown in Fi re 1 is cast integral with the piston P, an the arrangement of the member 'is such that the ports 16 and 17 are disposed at that point upon the iston which receives the greatest amount 0 thrust.

In the normal operation of an engine employingthe splash system of lubrication, the oil is thrown upwardly into the piston and cylinder for lubricating the contacting walls of the two elements. As the oil descends along the inner wall of the piston a ortion thereof passes into the member '1 rough the slot 15,. and because of the inclination of the member, this oil gravitates to the low'er portion of the member through the port 16 and finally through the port 17 to the contacting walls of the cylinder and piston. In this manner, the oil is delivered to that side of the piston which. receives the greatest amount of thrust, so that it is thoroughly lubricated at .all times to prevent uneven wear "at this point thus causing the piston at all times to properly fit within the cylinder so as to secure high compression and prevent carbonization.

In Fi re 3 I have shown a piston P provide with a pipe E arranged in the same manner as the member T and likewise provided witha slot 15 and a discharge port 16 which communicates with the outlet port 17 of the piston. In this form of my invention, the pipe E is made separately from the piston P and is adapted to'be secured in inclined position within the piston either by rivets, brazing, soldering, welding, bolts or the like or by threadedly fitting the same within the piston in the manner shown in Figure 3. This arran mentallo'ws of the I ready removal of the pipe to permit cleaning of the same should it become clogged so as to prevent the proper circulation of oil therethrough.

Referring now to Figure 4 I have shown another form of piston designated at P and which is formed exteriorly thereof with an annular channel 18 arranged in the same manner as the pipe P so that oil will gravitate to that point upon the piston at which the greatest thrust is exerted. Oil from a point interiorly of the piston is adapted to e supplied to the channel through one or more ducts 19 formed in the wall of the piston at the highest point of the channel. The oil traversing the inner wall of the piston is directed to these ducts by means of a flange 20 extending inwardly from the wall of the piston and for a short distance circumferentially of the piston.

In Figure 5 I have shown the wall of the piston provided with a plurality of slots 21 arranged one beside the other and inclined in the direction of the channel so that the oil moving downwardly of the inner wall of the piston will pass into such slots and ultimately into the channel.

Although I have herein shown and described only four forms of piston embodying my invention, it is to be understood that various changes and modifications may be made herein wlthout departing from the spirit of the invention or the spirit and scope of the appended claims,

What I claim is:

1. A cylinder piston formed exteriorly thereof with an annular inclined channel, ducts formed in the wall of the piston for eifecting communication-between the inner side of the piston and said channel, said ducts being arranged to conduct the oil traversing the inner wall of the piston into the channel at the highest point of the latter, and a flange formed interiorly of the piston for directing the oil into said ducts.

2. A cylinder piston formed exteriorly thereof with an annular inclined channel,

and havin a slot formed in the wall of the piston an communicating between the interior thereof and said channel to conduct oil from the inner side of the piston into the channel at the highest point of the latter.

3. A cylinder piston having an annular I inclined channel within its external surface,

highest point adjacent to the inner surface of the piston and communicating between the said channel and the interior of the piston. 4

5. A cylinder iston having an inner annular rib inclined a continuous channel openin exteriorly-of the piston entirely around the latter, said rib having an upwardly opening slot at its highestpoint adjacent to the inner surface of the piston and communicating between the said channel and the interior of the therein and provided withpiston and a guide flange upstanding from the said rib along the inner side of said slot.

ZENO ARNO BRUEGGER. 

